package com.ray.dingtalk.isv.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.util.EntityUtils;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;


/**
 * HTTP请求封装，建议直接使用sdk的API
 */
public class HttpHelper {
	private static final Logger log = LogManager.getLogger(HttpHelper.class);
	
	
	/**
	 * @desc ：1.发起GET请求
	 *  
	 * @param url
	 * @return JSONObject
	 * @throws Exception 
	 */
	public static JSONObject doGet(String url) throws Exception {

		//1.生成一个请求
		HttpGet httpGet = new HttpGet(url);
		//2.配置请求的属性
		RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(5000).setConnectTimeout(5000).build();//2000
		httpGet.setConfig(requestConfig);

		//3.发起请求，获取响应信息	
		//3.1 创建httpClient 
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		try {
			//3.2 发起请求，获取响应信息	
			response = httpClient.execute(httpGet, new BasicHttpContext());

			//如果返回结果的code不等于200，说明出错了  
			if (response.getStatusLine().getStatusCode() != 200) {

				log.info("request url failed, http code=" + response.getStatusLine().getStatusCode()
						+ ", url=" + url);
				return null;
			}
			//4.解析请求结果
			HttpEntity entity = response.getEntity();      //reponse返回的数据在entity中 
			if (entity != null) {
				String resultStr = EntityUtils.toString(entity, "utf-8");  //将数据转化为string格式  
				log.info("GET请求结果："+resultStr);
				JSONObject result = JSON.parseObject(resultStr);    //将String转换为 JSONObject

				if(result.getInteger("errcode")==null) {
					return result;
				}else if (0 == result.getInteger("errcode")) {
					return result;
				}else {
					log.info("request url=" + url + ",return value=");
					log.info(resultStr);
					int errCode = result.getInteger("errcode");
					String errMsg = result.getString("errmsg");
					throw new Exception("error code:"+errCode+", error message:"+errMsg); 
				}
			}
		} catch (IOException e) {
			log.info("request url=" + url + ", exception, msg=" + e.getMessage());
			e.printStackTrace();
		} finally {
			if (response != null) try {
				response.close();                     //释放资源

			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		return null;
	}


	/** 2.发起POST请求
	 * @desc ：
	 *  
	 * @param url   请求url
	 * @param data  请求参数（json）
	 * @return
	 * @throws Exception JSONObject
	 */
	public static JSONObject doPost(String url, Object data) throws Exception {
		//1.生成一个请求
		HttpPost httpPost = new HttpPost(url);

		//2.配置请求属性
		//2.1 设置请求超时时间
		RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(100000).setConnectTimeout(100000).build();
		httpPost.setConfig(requestConfig);
		//2.2 设置数据传输格式-json
		httpPost.addHeader("Content-Type", "application/json");
		//2.3 设置请求实体，封装了请求参数
		StringEntity requestEntity = new StringEntity(JSON.toJSONString(data), "utf-8");
		httpPost.setEntity(requestEntity);

		//3.发起请求，获取响应信息	
		//3.1 创建httpClient 
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;

		try {


			//3.3 发起请求，获取响应
			response = httpClient.execute(httpPost, new BasicHttpContext());

			if (response.getStatusLine().getStatusCode() != 200) {

				log.info("request url failed, http code=" + response.getStatusLine().getStatusCode()
						+ ", url=" + url);
				return null;
			}

			//获取响应内容
			HttpEntity entity = response.getEntity();
			if (entity != null) {
				String resultStr = EntityUtils.toString(entity, "utf-8");
				log.info("POST请求结果："+resultStr);

				//解析响应内容
				JSONObject result = JSON.parseObject(resultStr);

				if(result.getInteger("errcode")==null) {
					return result;
				}else if (0 == result.getInteger("errcode")) {
					return result;
				}else {
					log.info("request url=" + url + ",return value=");
					log.info(resultStr);
					int errCode = result.getInteger("errcode");
					String errMsg = result.getString("errmsg");
					throw new Exception("error code:"+errCode+", error message:"+errMsg); 
				}
			}
		} catch (IOException e) {
			log.info("request url=" + url + ", exception, msg=" + e.getMessage());
			e.printStackTrace();
		} finally {
			if (response != null) try {
				response.close();              //释放资源

			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		return null;
	}


/**
 * @desc ： 3.
 *   
 * @param url
 * @param file
 * @return
 * @throws Exception 
 *   JSONObject
 */
	public static JSONObject uploadMedia(String url, File file) throws Exception {
		HttpPost httpPost = new HttpPost(url);
		CloseableHttpResponse response = null;
		CloseableHttpClient httpClient = HttpClients.createDefault();
		RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();
		httpPost.setConfig(requestConfig);

		HttpEntity requestEntity = MultipartEntityBuilder.create().addPart("media",
				new FileBody(file, ContentType.APPLICATION_OCTET_STREAM, file.getName())).build();
		httpPost.setEntity(requestEntity);

		try {
			response = httpClient.execute(httpPost, new BasicHttpContext());

			if (response.getStatusLine().getStatusCode() != 200) {

				log.info("request url failed, http code=" + response.getStatusLine().getStatusCode()
						+ ", url=" + url);
				return null;
			}
			HttpEntity entity = response.getEntity();
			if (entity != null) {
				String resultStr = EntityUtils.toString(entity, "utf-8");

				JSONObject result = JSON.parseObject(resultStr);
				if (result.getInteger("errcode") == 0) {
					// 成功
					//result.remove("errcode");
					//result.remove("errmsg");
					return result;
				} else {
					log.info("request url=" + url + ",return value=");
					log.info(resultStr);
					int errCode = result.getInteger("errcode");
					String errMsg = result.getString("errmsg");
					throw new Exception("error code:"+errCode+", error message:"+errMsg); 
				}
			}
		} catch (IOException e) {
			log.info("request url=" + url + ", exception, msg=" + e.getMessage());
			e.printStackTrace();
		} finally {
			if (response != null) try {
				response.close();                  //释放资源
				
				
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		return null;
	}


	public static File downloadMedia(String url, String fileDir) throws Exception  {
		//1.生成一个请求
		HttpGet httpGet = new HttpGet(url);
		//2.配置请求属性
		RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();
		httpGet.setConfig(requestConfig);

		//3.发起请求，获取响应信息	
		//3.1 创建httpClient 
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		
		//4.设置本地保存的文件  
		File file = new File(fileDir);
		
		try {
			//5. 发起请求，获取响应信息	
			response = httpClient.execute(httpGet, new BasicHttpContext());
			log.info("HttpStatus.SC_OK:"+HttpStatus.SC_OK);  
			log.info("response.getStatusLine().getStatusCode():"+response.getStatusLine().getStatusCode());  

			//请求成功  
			if(HttpStatus.SC_OK==response.getStatusLine().getStatusCode()){  
				
				//6.取得请求内容  
				HttpEntity entity = response.getEntity();  

				if (entity != null) {  
					//这里可以得到文件的类型 如image/jpg /zip /tiff 等等 但是发现并不是十分有效，有时明明后缀是.rar但是取到的是null，这点特别说明  
					log.info(entity.getContentType());  
					//可以判断是否是文件数据流  
					log.info(entity.isStreaming());  
					
                    //6.1 输出流
					FileOutputStream output = new FileOutputStream(file);  
					//6.2 输入流：从钉钉服务器返回的文件流，得到网络资源并写入文件  
					InputStream input = entity.getContent();  
					
					//6.3 将数据写入文件：将输入流中的数据写入到输出流
					byte b[] = new byte[1024];  
					int j = 0;  
					while( (j = input.read(b))!=-1){  
						output.write(b,0,j);  
					}  
					output.flush();  
					output.close();   
				}  
				if (entity != null) {  
					entity.consumeContent();  
				}  
			}  
		} catch (IOException e) {
			log.info("request url=" + url + ", exception, msg=" + e.getMessage());
			e.printStackTrace();
		} finally {
			if (response != null) try {
				response.close();                       //释放资源
				
				
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		
		return file;
	}

	

}
